Automatic shift control method, apparatus, device and storage medium

The automatic shift control method addresses the issue of impact and noise in vehicle transmission systems by using an elastic release and position adaptive operation to stabilize and accurately control the disengaging and engaging apparatus, enhancing the driving experience through noise-free and impact-free mode switching.

US20250100534A1Active Publication Date: 2025-03-27ZHEJIANG ZEEKR INTELLIGENT TECH CO LTD +2
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Patent Information

Application Number
US18/720671
Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Filing Date
2022-12-08
Publication Date
2025-03-27
Estimated Expiration
2042-12-08

AI Technical Summary

Technical Problem

Existing vehicles with automatic transmission systems experience impact and noise due to clashes of meshing teeth during switching between four-wheel drive and two-wheel drive modes, affecting the driving experience.

Method used

An automatic shift control method that involves an elastic release operation followed by a position adaptive operation of the disengaging and engaging apparatus, allowing the moving component to reach a stable rotational speed and then being controlled to move to a completely disengaged position, reducing speed differences and avoiding impact during mode switching.

Benefits of technology

The method enables imperceptible automatic shift control by eliminating impact and noise during mode switching, improving the driving experience by ensuring non-contact or torque-free disengagement of the disengaging and engaging apparatus.

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Abstract

An automatic shift control method, apparatus, device and storage medium. A vehicle is controlled to perform an elastic release operation in response to a drive switching request. When unloading torque of a first electric machine of the vehicle is completed, a moving component of a disengaging and engaging apparatus of the vehicle is controlled to perform a position adaptive operation. Meshing direction and separation control is performed on the moving component when a rotational speed of the moving component reaches a stable state, to cause the moving component to move in a disengaging direction to a completely disengaged position, and switch of the vehicle from a four-wheel drive power mode to a two-wheel drive mode is completed.
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